--- title: "Discussion on \"8 explained examples of list comprehension in Python\" | Hashnode" description: "Discussion on \"8 explained examples of list comprehension in Python\". What is list comprehension\nList comprehension is a concise way used instead of for-loop when you want to create a new list based on another iterable (list, tuple, dictionary, set, string, generator, ...).\nYou get to do this:\n[do_this(element) for ele..." url: "https://hashnode.com/posts/8-explained-examples-of-list-comprehension-in-python/60754383308cd51e1478008c" --- [Feed](https://hashnode.com/feed) / Discussion # [8 explained examples of list comprehension in Python](https://girlthatlovestocode.com/8-explained-examples-of-list-comprehension-in-python?utm_source=hashnode&utm_medium=feed) What is list comprehension List comprehension is a concise way used instead of for-loop when you want to create a new list based on another iterable (list, tuple, dictionary, set, string, generator, ...). You get to do this: \[do\_this(element) for ele... Apr 13, 2021 · 9 min read · girlthatlovestocode.com Updated Apr 21, 2021 Read the article - [#python](https://hashnode.com/tag/python) - [#python3](https://hashnode.com/tag/python3) - [#python-beginner](https://hashnode.com/tag/python-beginner) ## Written by [GirlThatLovesToCode](https://hashnode.com/@GirlThatLovesToCode) @GirlThatLovesToCode · Slovenia [View profile](https://hashnode.com/@GirlThatLovesToCode) Self-taught developer that wants to support everyone that are learning to code, especially women. I'm passionate about learning new things -- both for myself and for teaching others. I'm a fan of Python and Django and want to know everything there is about those two. When I'm not writing code or a blog, I'm probably trying something new, reading, or spending time outside with my family. ## Responses 9 Markdown supported · ⌘↵ to post [Brian Ketelboeter](https://hashnode.com/@briancode1975) [Apr 16, 2021](https://hashnode.com/posts/8-explained-examples-of-list-comprehension-in-python/60754383308cd51e1478008c/comment/6079a0f5767ccc06dae34e83) it is a small thing, but you sometimes use 'array' (non-python) when you mean 'list' (python). Again, very small. [Apr 21, 2021](https://hashnode.com/posts/8-explained-examples-of-list-comprehension-in-python/60754383308cd51e1478008c/comment/6079a0f5767ccc06dae34e83#reply-607fc563c99e200d08f81cc4) Thank you for pointing that out, I fixed it. [Brian Ketelboeter](https://hashnode.com/@briancode1975) [Apr 16, 2021](https://hashnode.com/posts/8-explained-examples-of-list-comprehension-in-python/60754383308cd51e1478008c/comment/60799ec3767ccc06dae34e6b) A nice skill to discuss. Excellent choice of article content and clear explanation [GirlThatLovesToCode](https://hashnode.com/@GirlThatLovesToCode) [Apr 21, 2021](https://hashnode.com/posts/8-explained-examples-of-list-comprehension-in-python/60754383308cd51e1478008c/comment/60799ec3767ccc06dae34e6b#reply-607fc4cbc99e200d08f81cae) Thank you, I'm glad you liked it. [Kah](https://hashnode.com/@kahdev) [Apr 16, 2021](https://hashnode.com/posts/8-explained-examples-of-list-comprehension-in-python/60754383308cd51e1478008c/comment/60797e16c7bf370315009611) Nice list. I once used comprehension to divide a list into smaller groups. For example: ``` >>> source = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13] >>> [source[i:min(i + group_size, len(source))] for i in range(0, len(source), group_size)] [[1, 2, 3], [4, 5, 6], [7, 8, 9], [10, 11, 12], [13]] ``` [GirlThatLovesToCode](https://hashnode.com/@GirlThatLovesToCode) [Apr 21, 2021](https://hashnode.com/posts/8-explained-examples-of-list-comprehension-in-python/60754383308cd51e1478008c/comment/60797e16c7bf370315009611#reply-607fc4bbeb2bd30d2d22c85f) Great idea, thanks for sharing (: [Siddharth Chandra](https://hashnode.com/@chandraji) [Apr 15, 2021](https://hashnode.com/posts/8-explained-examples-of-list-comprehension-in-python/60754383308cd51e1478008c/comment/6077db6ba3407a32d7042b03) Totally agree with you on that list comprehensions work faster than traditional loops. Generally, if we write more pythonic code, it will always be more time-efficient I think. [GirlThatLovesToCode](https://hashnode.com/@GirlThatLovesToCode) [Apr 15, 2021](https://hashnode.com/posts/8-explained-examples-of-list-comprehension-in-python/60754383308cd51e1478008c/comment/6077db6ba3407a32d7042b03#reply-6077e82fa3407a32d7042c00) It's definitely more pythonic. But I did some research and it should be faster on simpler cases, but not on more complicated ones. [Siddharth Chandra](https://hashnode.com/@chandraji) [Apr 15, 2021](https://hashnode.com/posts/8-explained-examples-of-list-comprehension-in-python/60754383308cd51e1478008c/comment/6077db6ba3407a32d7042b03#reply-6077e9074155da32fc83bb7b) Yeah, I feel like as the complexity increases, python code execution tends to be slower irrespective of its pythonic nature 😅 [GirlThatLovesToCode](https://hashnode.com/@GirlThatLovesToCode) [Apr 15, 2021](https://hashnode.com/posts/8-explained-examples-of-list-comprehension-in-python/60754383308cd51e1478008c/comment/6077db6ba3407a32d7042b03#reply-6077ea9fa3407a32d7042c4b) This is an interesting idea 😅 [Mohammed Sameeruddin](https://hashnode.com/@msameeruddin) [Apr 14, 2021](https://hashnode.com/posts/8-explained-examples-of-list-comprehension-in-python/60754383308cd51e1478008c/comment/607705784155da32fc83aaad) Nice write up. 😀 Don't you think, the heading "Convert dollars to euros" should actually be "Convert euros to dollars". Moreover the function name is also `convert_to_dol()`. [GirlThatLovesToCode](https://hashnode.com/@GirlThatLovesToCode) [Apr 15, 2021](https://hashnode.com/posts/8-explained-examples-of-list-comprehension-in-python/60754383308cd51e1478008c/comment/607705784155da32fc83aaad#reply-6077ea67a3407a32d7042c2f) Thank you for noticing, I fixed it. [Amal Shaji](https://hashnode.com/@amal) [Apr 13, 2021](https://hashnode.com/posts/8-explained-examples-of-list-comprehension-in-python/60754383308cd51e1478008c/comment/60755497308cd51e14780215) Super cool post. List comprehensions are very useful. I've got some alternate solutions to make life harder. ### Simple Filtering ![image.png](https://cdn.hashnode.com/res/hashnode/image/upload/v1618301078690/UolWzvlfp.png) ### Filtering and applying some operation ![image.png](https://cdn.hashnode.com/res/hashnode/image/upload/v1618301186409/tW9cUh4T7.png) ### Combining all elements ![image.png](https://cdn.hashnode.com/res/hashnode/image/upload/v1618302012588/tjKJtPnrh.png) ### Common elements ![image.png](https://cdn.hashnode.com/res/hashnode/image/upload/v1618301583320/OUdurbb59.png) ### Using it with a function Use `map(Callable, Iterable)` ![image.png](https://cdn.hashnode.com/res/hashnode/image/upload/v1618301811996/qFqGMP5Uk.png) [GirlThatLovesToCode](https://hashnode.com/@GirlThatLovesToCode) [Apr 15, 2021](https://hashnode.com/posts/8-explained-examples-of-list-comprehension-in-python/60754383308cd51e1478008c/comment/60755497308cd51e14780215#reply-6077ea86a3407a32d7042c47) Thanks for making life harder :P [Tosin Ayodele](https://hashnode.com/@devtosxn) [Apr 16, 2021](https://hashnode.com/posts/8-explained-examples-of-list-comprehension-in-python/60754383308cd51e1478008c/comment/60755497308cd51e14780215#reply-6079d49d5af33606b2563d08) Exactly my point when I went through the work [GirlThatLovesToCode](https://hashnode.com/@GirlThatLovesToCode) [Vince](https://hashnode.com/@vinceknight) [Apr 13, 2021](https://hashnode.com/posts/8-explained-examples-of-list-comprehension-in-python/60754383308cd51e1478008c/comment/6075539a308cd51e14780204) This is a great resource, thank you for writing it. I'll be adding it to my list of extra reading for my class. [GirlThatLovesToCode](https://hashnode.com/@GirlThatLovesToCode) [Apr 15, 2021](https://hashnode.com/posts/8-explained-examples-of-list-comprehension-in-python/60754383308cd51e1478008c/comment/6075539a308cd51e14780204#reply-6077e852a3407a32d7042c0d) This is a comment every author wants to see (: [Jan Giacomelli](https://hashnode.com/@jangia) [Apr 13, 2021](https://hashnode.com/posts/8-explained-examples-of-list-comprehension-in-python/60754383308cd51e1478008c/comment/6075456f85f3a21e3926c8fd) Great post [GirlThatLovesToCode](https://hashnode.com/@GirlThatLovesToCode) [Apr 13, 2021](https://hashnode.com/posts/8-explained-examples-of-list-comprehension-in-python/60754383308cd51e1478008c/comment/6075456f85f3a21e3926c8fd#reply-60754ba7308cd51e1478015e) Thanks (: [GirlThatLovesToCode](https://hashnode.com/@GirlThatLovesToCode) [Apr 13, 2021](https://hashnode.com/posts/8-explained-examples-of-list-comprehension-in-python/60754383308cd51e1478008c/comment/6075453585f3a21e3926c8d9) The solutions for the practice ideas: `[(model, color, size) for model in models for color in colors for size in sizes]` `princesses_from_frozen = [frozen_char for frozen_char in frozen for princess in princesses for i_like in princesses_i_like if frozen_char == princess and frozen_char == i_like]` `[F"{name} {surname} - {age}" for name, surname, age in zip(names, surnames, ages) if int(age) > 20]`